<div class="page">
  <div class="weui-form">
    <div class="weui-form__text-area">
      <h2 class="weui-form__title">输入框状态</h2>
      <div class="weui-form__desc">可体验表单输入样式，当输入位数不等于16位的时候点击按钮可看到报错样式。</div>
    </div>
    <div class="weui-form__control-area">
      <div class="weui-cells__group weui-cells__group_form">
        <div class="weui-cells__title">表单报错</div>
        <div class="weui-cells weui-cells_form">
          <div class="weui-cell weui-cell_active" id="js_cell">
            <div class="weui-cell__hd"><label class="weui-label">卡号</label></div>
            <div class="weui-cell__bd weui-flex">
                <input id="js_input" class="weui-input" autofocus type="text" pattern="[0-9]*" placeholder="请输入16位数卡号" maxlength="16" />
                <button id="js_input_clear" class="weui-btn_reset weui-btn_icon weui-btn_input-clear">
                  <i class="weui-icon-clear"></i>
                </button>
            </div>
          </div>
        </div>
      </div>
      <div class="weui-cells__group weui-cells__group_form">
        <div class="weui-cells__title">表单只读、置灰</div>
        <div class="weui-cells weui-cells_form">
          <div class="weui-cell weui-cell_active weui-cell_readonly">
            <div class="weui-cell__hd"><label class="weui-label">EMail</label></div>
            <div class="weui-cell__bd">
                <input class="weui-input" placeholder="请输入EMail" value="1234567" readonly/>
            </div>
          </div>
          <div class="weui-cell weui-cell_active weui-cell_disabled">
            <div class="weui-cell__hd"><label class="weui-label">微信号</label></div>
            <div class="weui-cell__bd">
                <input class="weui-input" placeholder="请输入微信号" value="WeUI" disabled/>
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="weui-form__opr-area">
      <a class="weui-btn weui-btn_primary weui-btn_disabled" href="javascript:" id="showTooltips">确定</a>
    </div>
  </div>
  <div id="js_toast" style="display: none;">
      <div class="weui-mask_transparent"></div>
      <div class="weui-toast">
          <i class="weui-icon-success-no-circle weui-icon_toast"></i>
          <p class="weui-toast__content">已完成</p>
      </div>
  </div>
</div>

<script type="text/javascript">
    $(function(){
      var $tooltips = $('.js_tooltips');
      var $toast = $('#js_toast');
      var $input = $('#js_input');
      var $inputClear = $('#js_input_clear');
      var $cell = $('#js_cell');

      $input.on('input', function(){
        var $value = $input.val();
        if ($cell.hasClass('weui-cell_warn')){
          $cell.removeClass('weui-cell_warn');
        }
        if ($value){
          $('#showTooltips').removeClass('weui-btn_disabled');
        }else{
          $('#showTooltips').addClass('weui-btn_disabled');
        }
      });
      $('#showTooltips').on('click', function(){
          if ($(this).hasClass('weui-btn_disabled')) return;

          var $value = $input.val();
          if ($tooltips.css('display') != 'none') return;

          // toptips的fixed, 如果有`animation`, `position: fixed`不生效
          $('.page.cell').removeClass('slideIn');

          if($value.length < 16){
            $cell.addClass('weui-cell_warn');
            $tooltips.fadeIn(100);
            setTimeout(function () {
              $tooltips.fadeOut(100);
            }, 2000);
          }else{
            $toast.fadeIn(100);
            setTimeout(function () {
              $toast.fadeOut(100);
            }, 2000);
          }
      });
      $inputClear.on('click', function(){
        $input.val('');
      });
    });
</script>
